The main indexes ramped up to multiyear highs Tuesday as the market flashed a bullish sign. The Nasdaq jumped 1.3% in higher volume, delivering a follow-through that confirms a fresh uptrend. IBD's outlook has shifted to "market in confirmed uptrend." The tech-heavy index hit a level last seen in November 2000. Meanwhile, the S&P 500 jumped 1% and reached its best level since November 2007. The Dow Jones industrial average and NYSE composite both